Topaz
Al2 SiO4 F2
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—
Open
Topaz specimen from Minas Gerais, Brazil
©
Photo by Chip Clark, via Smithsonian National Museum of Natural History
5
0
—
Mineral, Aluminosilicate
Torbernite
Cu(UO2 )2 (PO4 )2 ·12H2 O
Autunite (group)
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Open
Torbernite specimen from Musonoi Mine, Democratic Republic of the Congo, and is 5.0cm in size.
©
Photo by Carlin Green, USGS, Public Domain
0
0
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Uranyl , Mineral, Hydrated , Phosphate , Orthophosphate
Tourmaline
A(D3)G6(Si6 O18 )(BO3 )3 X3 Z
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Fluor-uvite , Rossmanite , Oxy-dravite , Alumino-oxy-rossmanite , Chromium-dravite , Feruvite , Fluor-tsilaisite , Bosiite , Vanadio-oxy-dravite , Fluor-buergerite , Dravite , Maruyamaite , Chromo-alumino-povondraite , Darrellhenryite , Foitite , Oxy-schorl , Princivalleite , Povondraite , Uvite , Schorl , Celleriite , Tsilaisite , Oxy-chromium-dravite , Vanadio-oxy-chromium-dravite , Fluor-liddicoatite , Olenite , Fluor-schorl , Adachiite , Fluor-elbaite , Lucchesiite , Dutrowite , Oxy-foitite , Oxy-vanadium-dravite , Magnesio-lucchesiite , Fluor-dravite , Elbaite , Magnesio-foitite
Open
Crystal of schorl (tourmaline) with muscovite, from granite quarry, 10 km south-south-west of Lake Boga, Victoria, Australia. Specimen M 30758, Museums Victoria
©
Photo by Frank Coffa, Copyright Museums Victoria / CC BY (Licensed as Attribution 4.0 International)
0
0
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Silicate, Borate , Group
Trattnerite
FeIII 2 (Mg3 Si12 )O30
Osumilite (group)
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0
0
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Mineral, Silicate
Trembathite
Mg3 B7 O13 Cl
Boracite (group)
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0
0
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Mineral, Borate , Halide
Tremolite
☐Ca2 (Mg5.0-4.5 FeII 0.0-0.5 )Si8 O22 (OH)2
Tremolite root name group , Ferro-actinolite-Tremolite (series)
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Open
Tremolite from Mt Ibity, Antananarivo Province, Madagascar
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
6
0
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Mineral, Hydroxide , Silicate
Tremolite root name group
◻Ca2 (Mg4.5-5 M II 0-0.5 )Si8 O22 (OH,F,Cl)2 , M = FeII ,MnII
Calcium amphibole
Tremolite , Fluoro-tremolite
0
0
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Group , Silicate
Trevorite
NiFeIII 2 O4
Spinel (subgroup)
—
0
0
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Mineral
Tridymite
SiO2
Silica
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Open
A common form of Tridymite, ultra thin colorless tabulars (image width: 1,1 mm) - Locality: Wannenköpfe, Ochtendung, Eifel region, Germany
©
Photo by Fred Kruijen (via Wikimedia Commons), CC-BY-SA 3.0
2
1
CL
Mineral, Simple oxide
Trikalsilite
K2 Na(AlSiO4 )3
Feldspathoid (group)
—
0
0
—
Mineral, Aluminosilicate
Trinepheline
NaAlSiO4
Feldspathoid (group)
—
0
0
—
Mineral, Aluminosilicate
Triplite
MnII 2 (PO4 )F
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—
Open
Triplite gem (2.6 ct) from Pakistan
©
Photo by Greg Polley, via Smithsonian National Museum of Natural History
2
0
—
Mineral, Orthophosphate , Phosphate
Tripuhyite
FeIII SbV O4
Rutile (group)
—
0
0
—
Mineral
Trogtalite
CoSe2
Pyrite (group)
—
0
0
—
Mineral, Selenide
Troilite
FeS
Pyrrhotite (group)
—
0
0
—
Mineral, Sulphide